The Regalo Swing Down Double-Sided Bed Rail is ideal for your restless little sleeper who needs protection from rolling out of bed, or for beds that are not against a wall. These bed rails for twin bed include a bed rail for both sides of the bed. To accommodate thicker mattresses, the swing down bed rail is 20" high and extends 43" for extra security. If you need to access the bed, both rails swing down and out of your way. The double bed rail provides a safe sleep as your little one transitions to sleeping in a bed.